Issue: Unbound Materials Cannot Be Imported in maxUsd
Summary
When importing USD files into 3ds Max using maxUsd, materials that are not bound to any mesh are ignored or discarded during the import process.
Problem
USD supports defining materials independently of mesh bindings, allowing for reusable lookdev assets, material libraries, and deferred assignments. However, maxUsd appears to only import materials that are directly bound to a mesh via material:binding. As a result:
- Unbound materials are lost during import
Example
def Material "RedPlastic" {
token outputs:surface.connect = </RedPlastic/PbrShader.outputs:surface>
def Shader "PbrShader"
{
uniform token info:id = "UsdPreviewSurface"
color3f inputs:diffuseColor.connect = </RedPlastic/DiffuseTexture.outputs:rgb>
token outputs:surface
}
def Shader "DiffuseTexture"
{
uniform token info:id = "UsdUVTexture"
asset inputs:file = ...
...
}
}
# No mesh binding — material is ignored on import
Issue: Unbound Materials Cannot Be Imported in maxUsd
Summary
When importing USD files into 3ds Max using maxUsd, materials that are not bound to any mesh are ignored or discarded during the import process.
Problem
USD supports defining materials independently of mesh bindings, allowing for reusable lookdev assets, material libraries, and deferred assignments. However, maxUsd appears to only import materials that are directly bound to a mesh via
material:binding. As a result:Example